I saw an interview on the Pens website where Dumoulin said that his coach showed his team clips of Pens games and said "this is the system that we are going to run". When you have people like Kreider on your team as well, I can understand why. Also remember that Despres has mostly been mediocre his whole AHL career, but was solid in the NHL in his 20 games or so. Maybe some players just under-perform in the AHL.

Yup. Some players excel in the AHL but can't translate that to the NHL for a number of reasons (Chris Bourque is a good example). Other players seem to better in the NHL. From what I saw of Despres in the NHL last year, I'm not overly concerned about his play in the AHL. Morrow may be the same way. He already has an elite NHL point shot, skating ability, and physicality. He just needs to adapt to the system and work out the kinks. I think both will be fine.